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06-02-2020, 02:43 PM | #1 |
Scooby Specialist
Member#: 189394
Join Date: Sep 2008
Chapter/Region:
Tri-State
Location: New York City/NJ
Vehicle:9994 Impreza LSX STi AWD |
The AWD LSX STi
Note: Do not attempt this swap and expect to lower the engine using factory suspension mounting points. The only way to "lower" the engine is to do a body lift. Inspect and understand how and why Subaru achieved this on the Forester. If this does not make sense, then you will negatively impact handling by attempting to "lower" the engine and transmission. There are multiple reasons I made no attempt to move the engine relative to the original design. Last edited by shadowcompany; 06-09-2021 at 01:38 PM. |
06-03-2020, 02:02 PM | #2 |
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MAIC
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Vehicle:96 3MI Racing search FIRST, then PM!!! |
Please let us know when you get the corner weights for that thing
Definitely shoe-horned that in there. |
06-03-2020, 03:35 PM | #3 |
Scooby Specialist
Member#: 189394
Join Date: Sep 2008
Chapter/Region:
Tri-State
Location: New York City/NJ
Vehicle:9994 Impreza LSX STi AWD |
I can only tell you the car weighs less, makes more average power, and continues to climb in peak power past 7,000 rpm.
Most parts on the car are universal. It still uses an STi style clutch. |
06-03-2020, 05:28 PM | #4 |
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MAIC
Location: Lovettsville, Virginia
Vehicle:2008 Impreza WRX STi Silver |
Would I be correct in assuming this is built for drag?
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06-04-2020, 10:21 AM | #5 |
Scooby Specialist
Member#: 189394
Join Date: Sep 2008
Chapter/Region:
Tri-State
Location: New York City/NJ
Vehicle:9994 Impreza LSX STi AWD |
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06-04-2020, 12:22 PM | #6 |
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Member#: 334105
Join Date: Oct 2012
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MWSOC
Location: South East Michigan
Vehicle:2005 WRX Wagon Ver8 EJ207, 6MT, Red |
Well it definitely isn't meant for handling anymore. Slightly higher center of gravity and all that weight even farther ahead of the front axle's. Cool that you are keeping AWD.
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06-04-2020, 02:12 PM | #7 | |
Scooby Specialist
Member#: 189394
Join Date: Sep 2008
Chapter/Region:
Tri-State
Location: New York City/NJ
Vehicle:9994 Impreza LSX STi AWD |
Quote:
EG33 swapped (they are about the same length as the LS with short pulleys) Impreza have been used in motorsport with success. EG33 is no longer a viable swap though and EZ30 suffers from the same issues as the EJ. The AWD and steep angle of the driveline negates some of the downsides. Stock, Subaru understeer anyway. There is not a big difference in weight between the EJ in turbo trim and the LS in this car. Last edited by shadowcompany; 06-04-2020 at 03:11 PM. |
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06-06-2020, 04:39 AM | #8 |
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BAIC
Location: California
Vehicle:1998 2.5RS 207 Black |
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06-06-2020, 12:42 PM | #9 | |
Scooby Specialist
Member#: 189394
Join Date: Sep 2008
Chapter/Region:
Tri-State
Location: New York City/NJ
Vehicle:9994 Impreza LSX STi AWD |
Quote:
Depends what you are weighing. Aluminum based LS blocks are ~100 lbs lighter than an iron block. Components such as alternator, P/S pump, water pump, intake/exhaust manifolds, intercooler, turbocharger, clutch, and flywheel can change the weight. LS aluminum long block dressed can weigh from 425-500+ lbs with GM parts, LS aluminum block dressed with aftermarket parts (crank pulley, oil pan, alternator, water pump, etc.) can weigh 385-425 lbs. LS aluminum long block weighs ~350lbs with oil pan but no accessories Correction It actually weighs 310lbs with a Sikky oil pan and crank pulley and less than 350lbs with a subaru clutch/flywheel assembly LS aluminum short block weighs ~250lbs and that includes the cam and timing chain. By comparison: EJ257 DAVCS Subaru turbo long block dressed with mid frame turbo and EWG ~350+ lbs Subaru turbo long block dressed, stock ~325 lbs Subaru turbo long block ~210 lbs Subaru short block ~100 lbs For reference a group 35 battery is 35-40lbs and a GTX3076R is ~30lbs. A front mount intercooler and pipes is roughly ~40-50lbs, stock bumper support on JDM cars is 12 lbs. That is not a big difference when you double the amount of cylinders and more than double or triple the displacement, while keeping the whole Subaru AWD. The EJ engine is very light in SOHC (1.8-2.5L) naturally aspirated versions, ~200-225 lbs fully dressed. The LS comes with very bulky accessories from GM but many aftermarket parts are available that considerably drop weight. Last edited by shadowcompany; 12-17-2020 at 02:00 PM. Reason: Correction on weight |
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07-03-2020, 10:32 PM | #10 | |
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Quote:
So how much does YOUR completely dressed LS weigh? Cool deal keeping the 6mt and awd. Nice crank damper. The torque curve has to be fun, no turbo lag. Not "hating" on the swap, just don't act like you're improving on anything other than parts availability. I live in the south where LS engines are all over the place, and yes they do break in stock form. They have their quirks as well. |
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07-05-2020, 02:23 PM | #11 | |
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Vehicle:1998 2.5RS 207 Black |
Quote:
heres proof in the form of me personally weighing my V7 EJ207 fully dressed with flywheel https://imgur.com/0CVJCXx 333 and here is someone elses proof in the form of an LS1 on a scale https://imgur.com/q2eja6p 471 with no exhaust manifolds |
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07-12-2020, 06:40 PM | #12 | |
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Member#: 417685
Join Date: Apr 2015
Chapter/Region:
Tri-State
Location: Pennsylvania
Vehicle:'03 V7 EJ207, 6MT Sonic Yellow |
Quote:
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07-19-2020, 12:13 AM | #13 | ||||||
Scooby Specialist
Member#: 189394
Join Date: Sep 2008
Chapter/Region:
Tri-State
Location: New York City/NJ
Vehicle:9994 Impreza LSX STi AWD |
Quote:
Carb and coil on plug has its places. You can run more ignition timing and higher intake air temp. Soon..... Quote:
What you can get away with on LS engines is surprising. Cost, power, weight and reliability is the reason it is a common engine swap. Quote:
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Weight difference between bare long blocks is ~140lbs but that is not a comparison. Apparently its less than I thought. Quote:
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The EZ30 is cheap and more readily available. Either H6 also require a rework of the exhaust, cooling, and electronics but you don't have to cut the hood or use a transmission adapter. You are limited to motor mounts from an H6 though. Last edited by shadowcompany; 12-17-2020 at 02:02 PM. |
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07-29-2020, 12:02 AM | #14 |
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Member#: 48377
Join Date: Nov 2003
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MWSOC
Location: "They eat fish soaked in lye"
Vehicle:1996 Gutted, built XP class Impreza L |
Good to hear it's EFI. I just have a thing against Carbs.
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06-04-2020, 09:43 PM | #15 |
Scooby Guru
Member#: 33782
Join Date: Mar 2003
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Location: Milton Keynes, UK
Vehicle:96 3MI Racing search FIRST, then PM!!! |
I dig it. Should be fun.
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06-14-2020, 12:30 AM | #16 |
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Vehicle:2015 Stock OEM AsFu* 3.6r OMG S.C'd |
Shut up & TAKE MY $$
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07-03-2020, 04:49 PM | #17 |
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07-03-2020, 09:48 PM | #18 |
Scooby Specialist
Member#: 48377
Join Date: Nov 2003
Chapter/Region:
MWSOC
Location: "They eat fish soaked in lye"
Vehicle:1996 Gutted, built XP class Impreza L |
Please tell me that you aren't running a carb and coil-on plug...
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07-03-2020, 11:06 PM | #19 |
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Vehicle:02 RSTI MURK'D |
Sweet Christmas, sound clips please!!
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07-05-2020, 05:15 PM | #20 |
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Vehicle:2013 Impreza |
With more weight past the front wheels and higher up, this thing looks to be Audi-like with the power and handling characteristics when driven to the higher n/10ths. Just hope not of the iron block F/R longitudinal I5 variety. That being said, amazing job cramming that engine in there.
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10-12-2020, 12:04 AM | #21 |
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12-17-2020, 12:18 PM | #22 |
Scooby Specialist
Member#: 189394
Join Date: Sep 2008
Chapter/Region:
Tri-State
Location: New York City/NJ
Vehicle:9994 Impreza LSX STi AWD |
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12-17-2020, 01:26 PM | #23 |
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Vehicle:97 Impreza OBS Red to be white |
Thanks for taking the time to weight everything! I've always been curious what the approximate weight was for other projects I've thought of.
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12-19-2020, 02:08 AM | #24 |
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Vehicle:1998 /2005 STunIcorn Acadia Green USDM 22b |
WOW just WOW
Work of art Im perplexed about motor mounts Particularly on R side with all that piping and oil pan Subframe? I see the Toy Jet coolant collector (I guessing that is part name) with coolant hoses Where is the cooling part......the radiator cooling fins....I mean Trophy truck style? Last edited by AliBenn; 12-19-2020 at 02:16 AM. |
12-19-2020, 09:06 AM | #25 |
Scooby Specialist
Member#: 189394
Join Date: Sep 2008
Chapter/Region:
Tri-State
Location: New York City/NJ
Vehicle:9994 Impreza LSX STi AWD |
Last edited by shadowcompany; 12-19-2020 at 09:56 AM. |
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